Rotary pump or compressor.



R. Sol-man.

BOTAW PUMP OR CQMFRESSOR. APPLICATION msn MAR. 8. tan.

Lwwfiwh mmm Feb-26, 11918.

EMR? SHHR R SCHORR.

ROTARY PUMP OR COMPRESSOR. APPLICATION FILED MAR. 8.1911.

LQWSM% Patenta& %10.26.1918

2 SHEETS-SHEET 2.

fi &

RR E" $$HORH ROBERT SCHORE, OF SAN FRAZN'CISCO, CAIFORNIA.

ROTARY PUMP OR COMPRESSOR,

wamii i Specification of Letters Pateit.

Patented Feb. 2 8, 191&

Application med Ma-bh a, 1917. Serial Ne. 153390.

To all 'who-rit it 'may conccrn:

Be lt known that I, ROBERT SCHORR, a

citizen ot the United States, residing at San,

Francisco, in the County of San Francisco and State of California, have invented new i and useful Improvenents in Rotary Pumps or Compressors, ot which the following is a specification. 4

The present invention relates to improveinents in rotary punps and compressors.

Most of the Varieties of pumps of the above character have too small an eXtent of watertght or scaling surfaces between the nlet and. the outlet, thus leading to eXcessive leakage and consequent low eiiiciency. The main object of the present invention is to provide an efiicient pump by reducing backslipping` and leaking to a minimum, and to acconplish this by providing rotary and stationary elements which coperate in such a manner as to insure at all times water tight cent-acts between the suction and the pressure parts of the pumps; and a further object is to provide rotors having ends of suchshape as to reuder it impossible for the fluid to be carried past said ends to the suction inlet. v

A further object is to provide a construc tion of rotary pump such that all joints which serve the purpose of interpolating tight surfaces-between the suction and the pressure ends can'be accurately finished by machine tools.

In the accompanying drawing, Figure 1' is a cross-sectional view of my improved pump, taken on the line l--l of Fig. 2 ;'Fig. 2 is a longtudinal section thereof taken on the line 2-2 of Fig. 1; Fig. 3 is a diagrammatic View, showing how the coperating rotary elements make with each ,other a water-tight fit at all stages in their rotation in contact with each other. Fig. 4: is a diagrammatic sectional View illustrating one of the positions of the rotors of the punp; Fig. 5 is a sectional view showing a modification of the pump housing 'for high speed operation.

Referring to drawing, 1 indicates a pump housing, having a cover 2. Extending through said cover into said housing are shafts 3 and 4:, geared together by spur wheels 5 and 6. Fastened to one of the shafts is ,a drivinp; pulley 7. The shafts 3 and 4 are supported on the 'outside of the ump housing by a double hearing` 8, and m the housing by the bear gs 9, 0. Th@

openings by which the shatt pass through the cover 2 are sealed by stuffing boxes ll. For larger sized pumps stufling boxes would also be'provided at the other end to extend the sha fts for the purpose of mounting an additional set of gears and outside bearings, thus eliminating the inside bearings 9, 10. The pump housing and the outside bearings are mounted upon a bed-plate 12.

The fluid enters at 13 into a suction chamber 14, and is drawn through an openingl into one of two rotor chambers 17 by the suction created by the rapid rotation, in the directions indicated by the arrows, of rotor 18, havingportions 19 secured to the shafts 3, 4, and extensions or piston 21. The space in the rotor chamber 17, unoccupied by the piston 21 becomes in this way alternately filled with fluid, which is forced` ofthe surfaces BD and CE which are located between the inlet and outlet of the pump. The peculiar shape of the ends or working faces of the pistons is essential 'for ettecting a complete discharge. The pistou surface ab, (see Fig. 3,) is so designed as to remain in contact with the' edge c of the other piston surface during the travel :from A to B, and conversely. e

The water space f in each of the water chambers is reduced gradually until it finally disappears altogether.

Each rotor extends through onehalf of a cylinder, and each occupies almost one-half of the pump chamher, which it passes through in one revolution. The pump is reversible, but the volumetrical efiiciency is somewhat smaller if the rotors turn outward toward the floor line, that is in the opposite direction from the one indicated by the arrows.

In Fig. 5 is shown a modification of the pump housing in which there are provided auxiliary suction inlets 25, ,and discharge outlets 26. These are necessary if the width of the rotors is restricted, Tn that case Would he structirally inpossibie to provide sufficient areas for the passages 16"an*d22 Without inereasing very considerahlythe diameter of the puinp chamber. Such a narrowarrangenient obviously requires greate' i speed for a given unit capacity, and this 1. In comhinetion With housing, two

hol-lowsemi cylindricai rotors, revoinble in eppoite directions in said housing, said housing having stationary outlet 'chainbers strange& concentricaily With the respective rotors, v-

r 2. In conbination With a housing, two

a hollow sen'ii-cylindrical rotcrs having sickleshaped end surfaces andrevoluble-inopposte directions in said hous ng seid housing *hai in stationar outlet ehanihers arranged coneentrically With the respective 'etors.

In conbnation Wth e housing, two holiow semi-cyhndrical rotoi's and revoluhle fin oaosite directions in said -housin hav'- ing end surfaces ar'ranged to insur e riding contact of an end of one rotoi* upon an adjacent end" of another fotot during the end o f the dischei'ging period, said housin g hev- Gppiso! this patent may be `olat eined for in'" stationar outlet chanibers 'arran 'ed b v v r coneentriaily With the respective rotors.

4:; neombination with a housing, two heliov sem eyhnd 'ical 'eters revolnble 111 Qp posite d ctions in. said housing, the

pethsi of idi'otors o erlapping each othei" d in contact With eorresponding eoneave surfaces of the statienai'joutlet: chan bers, sa d housing hav ng statonary outlet chambers ar'anged concentrically With'the respective rotors. In eombinatien With a housing, two hoilow seni-cylindrieal roto's 'evoluble in opposite directions in said housing, the paths of said rotors overlappng each other and being in contact With corresponding concave sui-faces of the stationary outlet chambers, said ontlet chamhers communicating With a` punp chamber, said housing; having stationary outlet chambe'sar `anged coneentrically with the respective rotors 6. ln'eonbinetion With a housing` having inlet passages for fluid and stationary outle chambe's, two holiow semi-eyiindricai roto's evoiuble inepposite directions, and having end snrfac es shaped to pel-mit riding` contact of a surface of one i'oto' upon a surface of the other Fotot dn'ing the end of the dischrging period.

7. In conbination With a housing having inlet passages foi- 'fluid and stationary outle t chanbers, two hoilow seni-cylinch'icai rotors fevohibie in opposite directions, and having end surfaces shaped to pel-mit i-iding contact of a sui-face of one rotor upon a sm'- i'aceof the other rotor during the end of' the dischei-ging period, said housing having additionai inlet and outlet openings in its side.

S. In conbination with housing having inlet passages 'fol' fluid and stationry ontlet ehanbe''s, two hoHow seni-cyhndricai motors revoiubie in opposite directions, and

having end'surfaces sheped to pe'nit 'iding contact of the surface of one roto` upon the surface of the other roto' dui-ing the end of the discha' ing period, and means for noving, theretors in nnison from the outside o'" the housing.

ROBERT SCI-IORR.

five cents each, byeddressi ng the "Commisioner of Patents, Washington, 1), C." 

